package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 添加套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void add(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //添加套餐基本信息
        setmealMapper.add(setmeal);
       //获取套餐id
        Long setmealId = setmeal.getId();

        //获取套餐菜品
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish->{
                setmealDish.setSetmealId(setmealId);
            });

            //保存套餐和菜品的关联关系
            setmealDishMapper.add(setmealDishes);
        }
    }


    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 根据id查询套餐和关联的菜品数据
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.getById(id);
        List<SetmealDish> setmealDishList = setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishList);

        return setmealVO;


    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //对于套餐表进行修改
        setmealMapper.update(setmeal);

       //获取套餐id
        Long setmealId = setmealDTO.getId();

        //对于套餐菜品关系表 先将该套餐包含的菜品删除  再进行添加 来完成修改
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish->{
                setmealDish.setSetmealId(setmealId);
            });

            //新增套餐和菜品的关联关系
            setmealDishMapper.add(setmealDishes);
        }
    }

    /**
     * 删除套餐
     * @param ids
     */
    @Override
    @Transactional
    public void delete(List<Long> ids) {
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus()== StatusConstant.ENABLE){
                //起售的套餐不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId->{
            //删除套餐表数据
            setmealMapper.deleteById(setmealId);

            //删除套餐和菜品的关联关系数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });


    }


    /**
     *  起售停售套餐
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
       //起售套餐时，  判断该套餐下的菜品是否都起售  如果有未起售菜品 该套餐就不能起售
        if(status==StatusConstant.ENABLE){
            List<Dish> dishList =dishMapper.getBySetmealId(id);
            if(dishList != null && dishList.size() > 0){
                dishList.forEach(dish->{
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

       Setmeal setmeal = Setmeal.builder()
               .id(id)
               .status(status)
               .build();
        setmealMapper.update(setmeal);

    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    @Override
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    @Override
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
